CVE-2026-12363

CVE-2026-12363 : The LoRaWAN Fragmented Data Block Transport service does not validate frag_counter in DATA_FRAGMENT before passing it to the decoder. frag_counter is derived from the payload (frag_index_n & 0x3FFF) and, when 0, causes fragCounter − 1 to underflow, writing out of bounds in the de...

CVE-2026-12363

The LoRaWAN Fragmented Data Block Transport service subsys/lorawan/services/fragtransport.c does not validate the fragment counter in a received DATAFRAGMENT command before forwarding it to the configured decoder. In fragtransportpackagecallback the value fragcounter = hdr-fragindexn & 0x3FFF is...

CVE-2026-12363: Out-of-bounds Write

The LoRaWAN Fragmented Data Block Transport service subsys/lorawan/services/fragtransport.c does not validate the fragment counter in a received DATAFRAGMENT command before forwarding it to the configured decoder. In fragtransportpackagecallback the value fragcounter = hdr-fragindexn & 0x3FFF is...